A Candidate for an Intrinsic Dusty Absorber with a Metal-rich Damped Ly alpha Absorption Line System in the Quasar J170542.91+354340.2

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	A Candidate for an Intrinsic Dusty Absorber with a Metal-rich Damped Ly alpha Absorption Line System in the Quasar J170542.91+354340.2
	Pan, Xiang 1,2; Zhou, Hongyan 1,2; Ge, Jian 3; Jiang, Peng 1,2; Yang B(杨彬)4 ; Lu, Honglin 1; Ji, Tuo 1,2; Zhang, Shaohua 2; Shi, Xiheng 2
刊名	ASTROPHYSICAL JOURNAL
	2017-02-01
卷号	835 期号:2
关键词	dust, extinction quasars: absorption lines quasars: individual (SDSS J170542.91+354340.2)
ISSN号	0004-637X
通讯作者	Pan, Xiang(Univ Sci & Technol China, Chinese Acad Sci, Dept Astron, Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China)
产权排序	第4完成单位
英文摘要	We present a detailed analysis of the unusual damped Ly alpha absorption line system (DLA) toward the quasar SDSS J170542.91+354340.2 at a redshift of 2, previously reported by Noterdaeme et al. as one of the very few CO absorbers known to date at high z. This DLA is exceptional in that: (1) its extinction curve is similar to peculiar Milky Way sightlines penetrating star formation regions; (2) its absorption components are redshifted at a speed of several hundred km s(-1) compared to broad Balmer emission lines; (3) its gas-phase metallicity is super-solar as evaluated from more than 30 absorption lines; (4) detection of residual flux in the DLA trough and variability of C IV absorption is possible. Based on these facts, we argue that this dusty DLA is a good candidate for an intrinsic quasar 2175 angstrom absorber, and can originate from star formation regions of the quasar's host galaxy. We discuss in detail the gas and dust properties, and the dust depletion. Follow-up observations, such as spectropolarimetry and optical/infrared spectroscopy, will help to confirm the system's intrinsic nature and to explore how dust grains behave in the extreme environments proximate to quasars.
学科主题	天文学
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	DIGITAL SKY SURVEY ; ACTIVE GALACTIC NUCLEI ; INTERSTELLAR EXTINCTION LAW ; ULTRAVIOLET EXTINCTION ; MAGELLANIC-CLOUD ; REDDENED QUASARS ; HIGH-REDSHIFT ; DATA RELEASE ; MU-M ; GALAXIES
收录类别	SCI
原文出处	http://iopscience.iop.org/0004-637X/835/2/218/
语种	英语
WOS记录号	WOS:000401154800010
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/10062]
专题	云南天文台_其他
作者单位	1.A Candidate for an Intrinsic Dusty Absorber with a Metal-rich Damped Lyα Absorption Line System in the Quasar J170542.91+354340.2.pdf 2.Polar Research Institute of China, 451 Jinqiao Road, Shanghai 200136, China 3.Astronomy Department, University of Florida, 211 Bryant Space Science Center, P.O. Box 112055, Gainesville, FL 32611, USA 4.National Astronomical Observatories, Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
推荐引用方式 GB/T 7714	Pan, Xiang,Zhou, Hongyan,Ge, Jian,et al. A Candidate for an Intrinsic Dusty Absorber with a Metal-rich Damped Ly alpha Absorption Line System in the Quasar J170542.91+354340.2[J]. ASTROPHYSICAL JOURNAL,2017,835(2).
APA	Pan, Xiang.,Zhou, Hongyan.,Ge, Jian.,Jiang, Peng.,Yang B.,...&Shi, Xiheng.(2017).A Candidate for an Intrinsic Dusty Absorber with a Metal-rich Damped Ly alpha Absorption Line System in the Quasar J170542.91+354340.2.ASTROPHYSICAL JOURNAL,835(2).
MLA	Pan, Xiang,et al."A Candidate for an Intrinsic Dusty Absorber with a Metal-rich Damped Ly alpha Absorption Line System in the Quasar J170542.91+354340.2".ASTROPHYSICAL JOURNAL 835.2(2017).